Re-Branding

Hey brains trust. 

After some thoughts and opinions from those who have done this (or just in general if you feel you have the knowledge).
We are currently rebranding - new name, new domains, new everything. We want to switch everything over quickly when we announce our launch (ideally within 24 - 48 hours)  - including our website.

The website has been running for 8 years on squarespace - small investment in SEO and follows best practices. The website functions as an information centre (so gallery, about us, etc) - not a huge amount of 'regular traffic' as we are a service based business in a specific niche. Most comes from word of mouth and instagram - which then directs to the website where potential clients come for additional info or to complete a contact form.

We have the drafts of the website pages ready as wireframes - however I am unsure the best approach - with the least amount of disruption/damage in terms of making it live.

Do I rebuild the site again as a new project and then redirect urls/domain from the old site to the new one (which will have a new primary domain)

Or do we build the content in the background on the old site and then use that 24/48 hours to make the styling changes and add the new domain name as primary?

Or build the new site as a new project and export all the pages to be loaded to the old one?

Notes - no commerce, nothing 'needed' from old site backend.

Thanks so much in advance for your opinions.

I think you should post this on Circle Forum, You will get much better replies

Thank you, will do.